While the 49-year-old was drinking though, he told Meyers that he let his 5-year-old daughter Cleo Buckman Schwimmer try both wine and beer and even though she hates wine, she "loves" beer. Uh-oh, LOLz!

Ch-ch-check out Ross tasting some wine and talk about his little girl's burgeoning alcohol problem (below)!

In July, father John McCain was diagnosed with stage 4 glioblastoma, an aggressive form of brain cancer, which also claimed Beau's life.

When the 33-year-old began crying, the politician went over and consoled her, adding:

"There is hope... And if anybody can make it, your dad [can]."

Biden is also optimistic about "breakthroughs that are occurring now," regarding potential treatment options and cures.

"There's a lot of things happening. Any of you who have somebody who is diagnosed with gliobastoma, which is about as bad as it gets, there's breakthroughs that are occurring now... And it can happen tomorrow."